If you want to place a banner of this site on your site, you should use following Advertising Style Guide:

Do not change size, color or scale of suggested banners.

Following text colors should be used:
blue #023F88
red #ED1C24
light-grey #E8E6D4
grey #A7A9AC
pale blue #C5D6DC

You also can use suggested CSS-styles of text decoration.